roundedString(default: undefined)
Controls what border radius is applied to a button. Valid values are: "small", "medium", "large", and "full". When undefined (the default), the theme controls the default border radius.
The
"none"value is deprecated. Use custom CSS to remove border radius.
Example
<button id="button" type="button">Cancel</button>
<script>
$("#button").kendoButton({
rounded: "full"
});
</script>